首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4376篇
  免费   239篇
  国内免费   27篇
耳鼻咽喉   21篇
儿科学   111篇
妇产科学   91篇
基础医学   693篇
口腔科学   65篇
临床医学   326篇
内科学   1066篇
皮肤病学   71篇
神经病学   671篇
特种医学   146篇
外科学   314篇
综合类   12篇
预防医学   198篇
眼科学   36篇
药学   327篇
中国医学   10篇
肿瘤学   484篇
  2024年   11篇
  2023年   29篇
  2022年   70篇
  2021年   124篇
  2020年   71篇
  2019年   79篇
  2018年   127篇
  2017年   94篇
  2016年   93篇
  2015年   111篇
  2014年   149篇
  2013年   200篇
  2012年   315篇
  2011年   290篇
  2010年   161篇
  2009年   175篇
  2008年   300篇
  2007年   295篇
  2006年   260篇
  2005年   255篇
  2004年   256篇
  2003年   215篇
  2002年   185篇
  2001年   78篇
  2000年   68篇
  1999年   70篇
  1998年   49篇
  1997年   46篇
  1996年   33篇
  1995年   24篇
  1994年   33篇
  1993年   21篇
  1992年   37篇
  1991年   27篇
  1990年   23篇
  1989年   26篇
  1988年   26篇
  1987年   38篇
  1986年   22篇
  1985年   31篇
  1984年   17篇
  1983年   12篇
  1982年   10篇
  1980年   7篇
  1979年   17篇
  1978年   9篇
  1977年   8篇
  1976年   7篇
  1975年   7篇
  1974年   8篇
排序方式: 共有4642条查询结果,搜索用时 15 毫秒
51.
Introduction. The World Health Organization recognizes that viral hepatitis is not only a massive public health issue but also a huge opportunity to improve quality of life and equity at a global level. Viral hepatitis causes about 1.5 million deaths each year and significantly affects the quality of life of hundreds of millions of people. To date, frail individuals in high-income countries and people living in low-income settings are paying the heaviest tool.

Areas covered. Here we present a broad discussion on current knowledge and topical issues about the hepatitis pandemic. The report includes a structured overview of global epidemiology, including the definition of specific local epidemic profiles for each hepatitis agents (HAV, HBV, HCV, and HEV), and a perspective about the critical actions needed for achieving a complete control.

Expert commentary. The control of viral hepatitis is currently, ethically urgent and even economically convenient. There is a wide consensus that viral hepatitis can be controlled through comprehensive intervention tailored on local needs addressing the issue of viral hepatitis as a unique public health issue. These strategies should include: (1) primary prevention (including vaccination and improved infection control), (2) improving diagnosis rate, and (3) management of existing cases of infections.  相似文献   

52.
53.
La radiologia medica - This study aims to analyze safety and effectiveness of PHIL® (Microvention, CA-USA) in peripheral endovascular embolization procedures, both in elective and emergent...  相似文献   
54.
55.
BACKGROUND & AIMS: Celiac disease (CD) has been associated with several genetic disorders, but has not been associated with hereditary fructose intolerance (HFI). METHODS: We identified CD in 4 female patients affected by HFI from among 38 Italian HFI patients. RESULTS: Three of these patients were children in whom the CD-associated signs were hypertransaminasemia, failure to thrive, low weight, and short stature, whereas the adult patient had protracted diarrhea notwithstanding a fructose-free diet. The incidence of CD in our group of HFI patients was higher (>10%) than in the general population (1%-3%) (P<.02). CONCLUSIONS: The possibility of an association between these 2 gastrointestinal disorders is important, particularly in the management of HFI patients with persisting symptoms.  相似文献   
56.
An important issue in contemporary cognitive neuroscience concerns the role of motor production processes in perceptual and conceptual analysis. To address this issue, we studied the performance of a large group of unilateral stroke patients across a range of tasks using the same set of common manipulable objects. All patients (n = 37) were tested for their ability to demonstrate the use of the objects, recognize the objects, recognize the corresponding object-associated pantomimes, and imitate those same pantomimes. At the group level we observed reliable correlations between object use and pantomime recognition, object use and object recognition, and pantomime imitation and pantomime recognition. At the single-case level, we document that the ability to recognize actions and objects dissociates from the ability to use those same objects. These data are problematic for the hypothesis that motor processes are constitutively involved in the recognition of actions and objects and frame new questions about the inferences that are merited by recent findings in cognitive neuroscience.  相似文献   
57.

Background

Social adjustment is impaired in depressed patients. The difficulty to adjust to social circumstances has been hypothesized to be one of the causes of depression, as well as a consequence of the disorder. Genetic variation in the serotonin transporter gene has been previously associated with social adjustment levels in patients with mood disorders.

Methods

We investigated whether variations on the HTR1A (rs6295) and HTR2A (rs7997012) genes were associated with levels of social adjustment using the Social Adjustment Scale in two samples of depressed patients (total n=156).

Results

Patients carrying the GG genotype of the HTR2A-rs7997012 showed better social adjustment in areas of work and family unit bonding.

Limitations

These findings did not survive correction for multiple testing and should be interpreted with caution.

Conclusion

Our finding is in line with previous observations that have associated the G allele of the HTR2A-rs7997012 with higher rate of antidepressant response. The HTR2A-rs7997012 is worthy of further investigation in studies examining factors that are related to depression course and outcome.  相似文献   
58.
Neurological Sciences - Literature data reporting SARS-CoV-2 infection in multiple sclerosis (MS) patients recently treated with immunodepleting agents as cladribine and alemtuzumab are very...  相似文献   
59.
Annals of Biomedical Engineering - The uterosacral ligaments (USLs) are important anatomical structures that support the uterus and apical vagina within the pelvis. As these structures are...  相似文献   
60.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号